Combined latch and lock



(Model.) 8 f JADAMSg COMBINED LATGHV'AND LOCK.

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UNITED STATES PATENT Genion.

l JoHN ADAMS, on CLAY CENTRE, KANSAS.

COMBINED I .fiTcH-.AtiD' LOCK.

SPECIFICATION forming part of Letters Patent No.. 377,733, dated February 14, 1,888. Application filed August 13, 1887. Serial No. 246.857. (Model.)

To @ZZ whom it may concern.-

Be itknown that I, JOHN ADAMS, a citizen of the United States, residing at Clay Centre,

hereinafter fully described and specifically claimed, whereby a latch is produced which is operated by means of the gravity of its tum bler and a key of simple construction, and which is guarded against picking and is otherwise as convenient and easy to operate as any of the superior spring-latches.

In the'accompanying drawings, Figure l is a view of the latch having its cover removed. Fig. 2 is a section of thelatch-case in the line x x of Fig. 8, the contents being shown in ele vation. Fig. 3 is an end view of the latch. Fig. 4 isa view of a portion of the case, eX- hibiting the seat of a tumbler-operating disk.

. Fig. 5 is a front view of the said disk, and

Fig. 6 is a section in the line g/ y of the same. Fig. 7`is a view of a key used in operating the device.

The letter A in the drawingsrepresents an ordinary latch-case; B, a gravitating tumbler; O, a latch-bolt; D, a lock-bolt, and E a locking-disk.

The tumbler B has the shaft f of an ordinary knob mechanism for its fulcrum, and it is moved by means of a lug, f', o n said shaft. This lug f is inserted into a notch, b, in the tumbler, which notch allows the lug a small amount of free motion, as seen in Figs. 1 and 2, and serves to lift the tumbler when the knob is turned up. When the tumbler. rises, it moves the lower arm of the lever c of the latch-bolt, as will be seen. rlhe lever c is pivot-ed at c to the'lock-case A, and is fitted into a suitable depression, b', in the tumbler in such way that it can be freely moved around the pin c by the swinging tumbler, the formation of the lever c and the depression b being such that the lever is moved backward by the portion b of the depression when the tumbler rises, and forward by the portion ba when the tumbler descends. The lever c may also `be moved backward by means oi a lug, f 2, on the shaft f of the knob mechanism, the said Ilug, moving the end portion c2 of the lever c down when the -knob is turned down.

`The latch-bolt G moves in guide-lugs a a', formed on the lock-case, and is provided with a pin, c3, which moves in a slot, 0*, in the up-y per end portion of the lever c, and thus the described motions of the tumbler B and lever c serve to move the latch-bolt C either into or out of the lock, or, in other words, latch or unlatch the door provided with such device. The locking-boltD moves upon two lugs, d d', of the latch-case, therebyforming a receptacle for dust and dirt, which is thereby prevented from entering the bearings of the bolt. 4The f l' upper bearing of the locking-bolt is the lower surface of the tumbler B.

Opposite the joint-line vof the tumbler and lock-bolt the lock-case is provided with a seat,

ai, for the locking-disk E, which disk is also sectors move in their respective seats inthe I means of a suitable key, and thus the lock-` 'bolt is moved out or inby turning the disk` surface and lifts the tumbler, thus opening the latch-bolt, as above described. While'ascending, the, tumbler B changes its position in respect to the Stationary disk, and in orderto avoid breakage of the said parts two spaces, e3 6*, are left between the rim'sectors ec,whichy are turned in line with the lower surface of Vthe rising tumbler and allow the portions b6 bl of the same to enter said spaces without jam.- ming against the disk.

At the upper end of the groove b5 a lateral Y extension, be, is provided, into which the lug e2 enters while the tumbler B is rising, thus :no Y

preventing breakage of the tumbler. When j:

the lock-bolt is moved out and the door is locked, the rim-sector e occupies the seat or depression di, and thus prevents the moving of the lock-bolt by the use of false keys and the like.

A night-latch or sliding check, G, of ordinary construction, is provided on the rear side of the lock-case, which latch is in line with a rear end portion, b", of the tumbler, and which when moved opposite the same prevents the tumbler from moving and the lock from being opened. In Fig. 4 a lug, a3, is shown in the back of the 1ock,whicl1 occupies the end portion of a circular slot, e5, in the disk E, and by its height allows or prevents the passage of the ward of the operating-key, so that only a ward of proper size can slip over the lug a3 and turn the disk back.

The gravitating tumbler B being hung to its fulcrum as close as practicable to the rear side of the lock and about the middle of its height, the tumbler is rendered more eifective in its operation than otherwise and its weight can be greatly reduced without danger of rendering the same inoperative.

The knob-shaft may have the lugs ffz formed with it, or it may be passed through a hollow collar having said lugs without changing the principle of' my invention.

l contemplate in some instances making my locks with one knob on the inside of the door, so that the door cannot be opened from the outside without a key.

A key, G, used for operating the look, is provided with a collar, g, a stepped end portion, g g', and a ward, g. Of the stepped end portion, g g', the part g will enter the lock from the rear side,for which purpose the round portion g5 of the keyhole is made small, while at the opposite side the round portion gof the key-hole is made large, so the portion g of the key can enter it. lIn the first case the step g serves as a collar for preventing the key from entering the lock too far, and in the second case the collar gs is provided on the key G for the same purpose.

The knob and its shaft f may be omitted in some instances and an ordinary thumb-latch provided for operating the tumbler.

I do not wish to confine myself to the preoise shape of the latch-level' c, as shown, for its form may in some instances be modified without changing the character of my invention.

What I claim as my invention is 1. In a gravitatinglatch,the tumbler B,hav ing depression b and portions b and b, in combination with the lever c, latch-boltO, and operating knob-shaft f, having lug f', substantially as and for the purpose described.

2. The combination of the latch-case A, having disk-seat a, tumbler B, having diskseat b* and groove b?, the lock-bolt D, having seats d2 !B and notch d, and thc disk E, having lug e?, substantially as and for the purpose described.

3. The combination ofthe tumbler B,having groove b5 and lateral groove-extension be, and the disk having lug e2, rinrsectors e e', and spaces ea e, substantially as and for the purpose described.

4. `The combination of the disk E, having lugs ez and rim-sectors e e', and the bolt I), having notch d* and seats d d,substantially as and for the purpose described. v

In testimony WhereofI afx my signatu re in presence of two witnesses.

JOHN ADAMS.

Witnesses:

WM. MOORE, ENocH CUMMrNGs. 

